/*
BEM 设计模式

模块 (没有前缀,多个单词用 - 连接)
元素 (元素在模块之后,可以有多个层级,以 __连接)
 */

/* 全局样式  ---------------------------------start */
body{
    margin: 0;
    padding: 0;
    background: #fff;
    font-size: 12px;
    font-family: "Microsoft YaHei", 微软雅黑, sans-serif;
}
a{text-decoration: none;}
h2,h3{
    padding: 0;
    margin:0;
    font-weight: normal;
}

/* 全局样式  ---------------------------------end  */

/* header-----------------------------------------------start  */
.header {    background: #f7f7f7;}
.header__wrap{
    /*border: 1px solid red;*/
    position: relative;
    width: 1200px;
    height: 80px;
    margin: 0 auto;
}
.header__logo{
    /*border: 1px solid red;*/
    width: 150px;
    height: 38px;
    line-height: 38px;
    font-size: 20px;
    color: #07111b;
    text-indent: 50px;/*首行缩进*/
    background: url("../image/js/实战demo/logo.png") left center no-repeat;
    background-size: 38px 38px;
    position: absolute;
    top: 50%;
    margin-top: -19px;
    left: 20px;
}
.header__nav{
    /*border: 1px solid red;*/
    position: absolute;
    right: 20px;
    height: 38px;
    top: 50%;
    margin-top: -19px;
}
.header__nav-item{
    /*border: 1px solid red;*/
    color: #292f35;
    font-size: 14px;
    display: block;
    height: 38px;
    line-height: 38px;
    float: left;
    width: 30px;
    text-align: center;
    padding-left: 40px;
    position: relative;
}
.header__nav-item:hover{    color: #f01400;}
.header__nav-item_status_active,
.outline__item_status_active{    color: #f01400;}
.header__nav-item_custom_button{
    background: #000;
    color: #f4f4f5;
    text-align: center;
    width: 90px;
    border-radius: 5px;
    padding: 0;
    margin-left: 40px;
}
.header__nav-tip{
    width: 50px;
    height: 2px;
    background: #d40112 ;
    position: absolute;
    bottom: 0;
    left: 0;
    margin-left: 30px;
    z-index: 3;
}
/* header-----------------------------------------------end  */

/* screen-1 第一屏----------------------------------------------------start  */
.screen-1{
    height: 800px;
    background: #e7e7e7 url("../image/js/实战demo/bg-screen-1.png") no-repeat center;
    position: relative;
    overflow: hidden;
    background-size: cover;/*背景自动填满,不受窗口缩放影响*/
}
.screen-1__heading{
    font-weight: normal;
    margin: 0;
    font-size: 46px;
    color: #4d555d;
    text-align: center;
    padding: 152px 0 0;/*上/下/左右*/
}
.screen-1__heading b{    color: #f01400;    font-weight: normal;}
.screen-1__phone{
    /* 使用图片的元素大小 */
    width: 1375px;
    height: 305px;
    background: url("../image/js/实战demo/screen-1-phone.png") no-repeat center;
    position: absolute;
    left: 50%;
    margin-left: -687px;
    bottom: 180px;
    z-index: 2;
}
.screen-1__shadow{
    /* 使用图片的元素大小 */
    width: 1233px;
    height: 411px;
    background: url("../image/js/实战demo/screen-1-shadow.png") no-repeat center;
    position: absolute;
    left: 50%;
    margin-left: -616px;
    bottom: 30px;
    z-index: 1;
    opacity: .8;/*透明度*/
}
/* screen-1 第一屏----------------------------------------------------end    */

/* screen-2----------------------------------------------------------start    */
.screen-2{
    background: #fafafa;
    height: 800px;
    position: relative;
    overflow: hidden;
}
.screen-2__heading{
    font-weight: normal;
    margin: 0;
    font-size: 46px;
    height: 46px;
    color: #f01400;
    text-align: center;
    padding: 96px 0 0;/*上/下/左右*/
}
.screen-2__subheading{
    font-weight: normal;
    margin: 0;
    font-size: 14px;
    color: #2c3137;
    text-align: center;
    padding: 25px 0 0;/*上/下/左右*/
    line-height: 28px;
}
.screen-2__phone{
    /*使用图片的高宽*/
    width: 928px;
    height: 873px;
    background: url("../image/js/实战demo/screen-2-phone.png") no-repeat center;
    position: absolute;
    left: 50%;
    margin-left: -464px;
    bottom: -345px;
    z-index: 2;
}
.screen-2__point{
    width: 108px;
    padding-right: 112px;
    height: 22px;
    font-size: 22px;
    line-height: 22px;
    color: #4d555d;
    position: absolute;
    background: url("../image/js/实战demo/icon-point-right.png") no-repeat center right;
}
.screen-2__point_custom_right{
    padding: 0 0 0 112px;/*上 右 下 左*/
    background: url("../image/js/实战demo/icon-point-left.png") no-repeat center left;
}
.screen-2__point_i_1{top: 155px;left: -135px;}
.screen-2__point_i_2{top: 190px;right: 90px;}
.screen-2__point_i_3{top: 400px;right: 25px;}

/* screen-2----------------------------------------------------------end    */

/* screen-3----------------------------------------------------------start    */
.screen-3{
    /*border: yellow 5px solid;*/
    background: #fafafa url("../image/js/实战demo/bg-screen-3.png") no-repeat center;
    height: 800px;
    position: relative;
    background-size: cover;
    overflow: hidden;
}
.screen-3__wrap{
    width: 1200px;
    height: auto;
    margin: 0 auto;
    position: relative;
}
.screen-3__heading{
    font-size: 46px;
    line-height: 46px;
    color: #fff;
    text-align: left;
    padding-top: 94px;
}
.screen-3__subheading{
    font-size: 14px;
    color: #fff;
    text-align: left;
    padding-top: 25px;
    line-height: 28px;
}
.screen-3__phone{
    width: 750px;
    height: 873px;
    background: url("../image/js/实战demo/screen-3-phone.png") no-repeat center top;
    position: absolute;
    right: 0;
    top: 195px;
    z-index: 2;
}
.screen-3__features{
    position: relative;
    top: 195px;
    left: 0;
    width: 320px;
    height: 280px;
}
.screen-3__features__item{
    width: 138px;
    height: 118px;
    border: 1px solid #cb7173;
    margin: 0 20px 20px 0;
    float: left;
    border-radius: 3px;
    color: #fff;
    text-align: center;
}
.screen-3__features__item__number{
    height: 36px;
    font-size: 36px;
    line-height: 36px;
}
.screen-3__features__item__desc{
    height: 14px;
    font-size: 14px;
    line-height: 14px;
}
/* screen-3----------------------------------------------------------end    */

/* screen-4----------------------------------------------------------start    */
.screen-4{
    background: #fff;
    height: 800px;
    position: relative;
    overflow: hidden;
}
.screen-4__wrap{
    width: 1200px;
    height: auto;
    margin: 0 auto;/*上下/左右*/
    position: relative;
}
.screen-4__heading{
    font-size: 46px;
    line-height: 46px;
    color: #f01400;
    text-align: center;
    padding-top: 135px;
}
.screen-4__subheading{
    font-size: 14px;
    color: #464a4f;
    text-align: center;
    padding-top: 29px;
    line-height: 28px;
}
.screen-4__type{
    width: 1260px;
    height: 270px;
    position: absolute;
    top: 304px;
    margin-left: 30px;
}
.screen-4__type__item{
    width: 220px;
    margin-right: 90px;
    height: 270px;
    float: left;
    position: relative;
    text-align: center;
    background-size:cover ;
}
.screen-4__type__item__color{
    width: 100%;
    height: 14px;
    line-height: 14px;
    font-size: 14px;
    color: #2c3238;
    position: absolute;
    bottom: -44px;
}
.screen-4__type__item_i_1{background: url("../image/js/实战demo/phone-1.png") no-repeat center top;}
.screen-4__type__item_i_2{background: url("../image/js/实战demo/phone-2.png") no-repeat center top;}
.screen-4__type__item_i_3{background: url("../image/js/实战demo/phone-3.png") no-repeat center top;}
.screen-4__type__item_i_4{background: url("../image/js/实战demo/phone-4.png") no-repeat center top;}
.screen-4__type__item__storage{
    width: 100%;
    height: 12px;
    line-height: 12px;
    font-size: 12px;
    color: #a4a9ae;
    position: absolute;
    bottom: -66px;
}


/* screen-4----------------------------------------------------------end    */

/* screen-5----------------------------------------------------------start    */
.screen-5{
    height: 800px;
    background: #d9dde1;
    position: relative;
    overflow: hidden;
}
.screen-5__bg{
    /*屏幕宽度*/
    width: 1920px;
    height: 433px;
    background: url("../image/js/实战demo/bg-screen-5.png") no-repeat center;
    background-size: contain;
    position: absolute;
    left: 50%;
    margin-left: -960px;
    bottom: -100px;
}
.screen-5__heading{
    font-size: 46px;
    line-height: 46px;
    color: #f01400;
    text-align: center;
    padding-top: 130px;
}
.screen-5__subheading{
    font-size: 14px;
    color: #2c3137;
    text-align: center;
    padding-top: 25px;
    line-height: 28px;
}

/* screen-5----------------------------------------------------------end    */
.screen-buy{
    height: 80px;
    padding: 120px 0;/*上下/左右*/
    position: relative;
    overflow: hidden;
    background: #2b333b url("../image/js/实战demo/bg-screen-buy.png") center no-repeat ;
    text-align: center;
}
/* 立即购买 */
.screen-buy__button{
    height: 80px;
    width: 240px;
    text-align: center;
    line-height: 80px;
    font-size: 24px;
    color: #fff;
    background: #f01414;
    display: inline-block;
    border-radius: 3px;
    transition:  all 0.5s;
}
.screen-buy__button:hover{
    box-shadow: 0 0 10px rgba(0,0,0,.5);
}
.footer{
    height: 80px;
    line-height: 80px;
    text-align: center;
    color: #fff;
    font-size: 12px;
    background: #07111b;
}

/* -----------------侧边栏--------------------------------------*/
.outline{
    position: fixed;
    padding: 5px 10px;
    bottom: 120px;
    right: 0;
    z-index: 3;
    background: #fff;
    box-shadow: 0 4px 12px rgba(0,0,0,.5);
}
.outline__item{
    display: block;
    width: 40px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    padding: 5px 0;
    background: #fff;
    margin-top: 5px;
    border-top: 1px solid #EEE;
    color: #93999f;
}
.outline__item:first-child{
    border: none;
}

